For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningOdometer
The odometer shows how far the vehicle has been driven, in either kilometers
or miles.
This vehicle has a tamper-resistant odometer. The digital odometer will read
999,999 if it is turned back.
If the vehicle needs a new odometer installed, it must be set to the mileage
total of the old odom ...
Antilock Brake System (ABS) Warning Light
The Antilock Brake System (ABS) light comes on briefly when the engine is started.
If the light does not come on, have it fixed so it will be ready to warn if there
is a problem.
If the ABS light comes on and stays on while driving, stop as soon as possible
and turn the ignition off.
Start ...
Using the Navigation System
Use the NAV button on the faceplate or Home Page to access the navigation map.
Press the NAV button again to change between alternative views of the normal
split and full map views.
The Menu screen button at the bottom right side of the display accesses the Navigation
Menu.
The touch-sens ...